as3.0视频的快进有拖动条

package com{
    import flash.display.MovieClip;
    import flash.events.MouseEvent;
    import fl.video.FLVPlayback;
    import fl.video.MetadataEvent;
    import flash.events.AsyncErrorEvent;
    import flash.net.NetConnection;
    import flash.net.NetStream;
    import flash.media.Video;
    import flash.utils.Timer;
    import flash.events.TimerEvent;
    import fl.video.VideoPlayer;
    import flash.media.SoundTransform;
    import flash.display.SimpleButton;
    import flash.geom.Rectangle;

    public class MyFlv extends MovieClip {

        private var dragMc:MovieClip;
        private var lineMc:MovieClip;
        private var backBtn:SimpleButton;
        private var stageMc:Object;
        private var emptyMc:MovieClip;
        private var progressMc:MovieClip;

        private var bounds:Rectangle;

        private var lineMcWidth:Number;
        private var lineMcX:Number;
        private var mcN:uint;

        //private var mm:MyMusic=new MyMusic();

        public function MyFlv(_emptyMc:MovieClip) {

            emptyMc=_emptyMc;
            //MyMusic.initialSound("看一看");
        }
        public function FlvFun(_dragMc:MovieClip ,_lineMc:MovieClip ,_stageMc:Object ,_progressMc:MovieClip ){

            progressMc=_progressMc;
            dragMc=_dragMc;
            lineMc=_lineMc;
            stageMc=_stageMc;

            lineMcX=lineMc.x;
            bounds=new Rectangle(lineMc.x,lineMc.y,lineMc.width,0);

            dragMc.buttonMode=true;
            dragMc.addEventListener(MouseEvent.MOUSE_DOWN,dragFun);
            dragMc.addEventListener(MouseEvent.MOUSE_UP,dragFun);
            stageMc.addEventListener(MouseEvent.MOUSE_UP,dragFun);

        }
        private function dragFun(e:MouseEvent):void {
            if (e.type=="mouseDown") {
                e.target.startDrag(false,bounds);
                dragMc.addEventListener(MouseEvent.MOUSE_MOVE,dragFun);
                timer.stop();
            } else if (e.type=="mouseUp") {
                stopDrag();
                timer.start();
                dragMc.removeEventListener(MouseEvent.MOUSE_MOVE,dragFun);
            } else if (e.type=="mouseMove") {

                vidProgressNum=vidTotalTime*(dragMc.x-lineMc.x)/lineMc.width ;
                ns.seek(vidProgressNum);

                var i:int=progressMc.totalFrames*(dragMc.x-lineMc.x)/lineMc.width;
                progressMc.gotoAndStop(i);
            }
        }

        //video=====================================================
        private var videoPath:String;
        private var vid:VideoPlayer;
        private var timer:Timer=new Timer(25);
        private var vidNowTime:Number;
        private var vidTotalTime:Number;
        private var vidProgressNum:Number;

        private var nc:NetConnection;
        public var ns:NetStream;
        private var soundTF:SoundTransform;

        private var obj:Object =new Object ();

        public function VideoFun() {

            vid=new VideoPlayer(1435.55,808.4);
            vid.x=241
            vid.y=205.4
            vid.smoothing=true;
            nc= new NetConnection();
            nc.connect(null);
            ns=new NetStream(nc);

            ns.play("sdfsd.mp4");
            vidTotalTime=vid.totalTime;
            vid.attachNetStream(ns);
            //ns.pause();
            ns.addEventListener(AsyncErrorEvent.ASYNC_ERROR, asyncErrorHandler);

            function asyncErrorHandler(event:AsyncErrorEvent):void {
                // 忽略错误
            }

            obj.onMetaData=onMetaData;
            ns.client=obj;
            function onMetaData(data:Object):void {
                vidTotalTime=data.duration;
            }
            emptyMc.addChild(vid);
            timer.addEventListener(TimerEvent.TIMER,tiemrFun);
            //timer.start();

            //声音=========================
            //soundTF=ns.soundTransform;//控制的目标
            //soundTF.volume=0;//设置目标的声音为0
            //ns.soundTransform=soundTF;

        }
        private function tiemrFun(e:TimerEvent) {

            vidNowTime=ns.time;
            dragMc.x = (lineMc.width) * vidNowTime / vidTotalTime  + (lineMc.x);

            var i:int=progressMc.totalFrames*(dragMc.x-lineMc.x)/lineMc.width;
            progressMc.gotoAndStop(i);
        }

        //================togglePause
        private var togglePause:SimpleButton;
        public function togglePauseFun(_togglePause:SimpleButton) {
            togglePause=_togglePause;
            togglePause.alpha=1;
            togglePause.addEventListener(MouseEvent.CLICK,ontogglePause);
        }
        private function ontogglePause(e:MouseEvent) {
            //MyMusic.pauseFuntion()
            //MyMusic.isSoundPlay=false
            if (togglePause.alpha==0) {
                togglePause.alpha=1;
            } else {
                togglePause.alpha=0;
            }
            ns.togglePause();
        }

        //===============up.down
        private var nextBtn:SimpleButton;
        private var prevBtn:SimpleButton;
        public function nextOrPrev(_nextBtn:SimpleButton,_prevBtn:SimpleButton) {
            prevBtn=_prevBtn;
            nextBtn=_nextBtn;
            nextBtn.addEventListener(MouseEvent.CLICK,onBtn);
            prevBtn.addEventListener(MouseEvent.CLICK,onBtn);
        }
        private function onBtn(e:MouseEvent) {
            if (e.target.name=="nextBtn") {
                ns.seek(vidNowTime+=5);
            } else {
                ns.seek(vidNowTime-=5);
            }
        }

        public function backFun(_backBtn:SimpleButton ) {
            backBtn=_backBtn;
            backBtn.addEventListener(MouseEvent.CLICK ,backBtnFun);
        }
        public function backBtnFun(e:MouseEvent ) {
            timer.removeEventListener(TimerEvent.TIMER,tiemrFun);
            dragMc.removeEventListener(MouseEvent.MOUSE_MOVE,dragFun);
            dragMc.removeEventListener(MouseEvent.MOUSE_DOWN,dragFun);
            dragMc.removeEventListener(MouseEvent.MOUSE_UP,dragFun);
            stageMc.removeEventListener(MouseEvent.MOUSE_UP,dragFun);
            emptyMc.removeChild(vid);
        }
    }
}//ns.close();